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1 | <?xml version='1.0'?> <!--*-nxml-*--> |
2 | <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" | |
12b42c76 | 3 | "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd"> |
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4 | |
5 | <!-- | |
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6 | SPDX-License-Identifier: LGPL-2.1+ |
7 | ||
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8 | This file is part of systemd. |
9 | ||
44f44a29 | 10 | Copyright 2012 Lennart Poettering |
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11 | --> |
12 | ||
dfdebb1b | 13 | <refentry id="systemd-cat" |
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14 | xmlns:xi="http://www.w3.org/2001/XInclude"> |
15 | ||
16 | <refentryinfo> | |
17 | <title>systemd-cat</title> | |
18 | <productname>systemd</productname> | |
19 | ||
20 | <authorgroup> | |
21 | <author> | |
22 | <contrib>Developer</contrib> | |
23 | <firstname>Lennart</firstname> | |
24 | <surname>Poettering</surname> | |
25 | <email>lennart@poettering.net</email> | |
26 | </author> | |
27 | </authorgroup> | |
28 | </refentryinfo> | |
29 | ||
30 | <refmeta> | |
31 | <refentrytitle>systemd-cat</refentrytitle> | |
32 | <manvolnum>1</manvolnum> | |
33 | </refmeta> | |
34 | ||
35 | <refnamediv> | |
36 | <refname>systemd-cat</refname> | |
37 | <refpurpose>Connect a pipeline or program's output with the journal</refpurpose> | |
38 | </refnamediv> | |
39 | ||
40 | <refsynopsisdiv> | |
41 | <cmdsynopsis> | |
42 | <command>systemd-cat <arg choice="opt" rep="repeat">OPTIONS</arg> <arg>COMMAND</arg> <arg choice="opt" rep="repeat">ARGUMENTS</arg></command> | |
43 | </cmdsynopsis> | |
44 | <cmdsynopsis> | |
45 | <command>systemd-cat <arg choice="opt" rep="repeat">OPTIONS</arg></command> | |
46 | </cmdsynopsis> | |
47 | </refsynopsisdiv> | |
48 | ||
49 | <refsect1> | |
50 | <title>Description</title> | |
51 | ||
52 | <para><command>systemd-cat</command> may be used to connect the | |
53 | standard input and output of a process to the journal, or as a | |
54 | filter tool in a shell pipeline to pass the output the previous | |
55 | pipeline element generates to the journal.</para> | |
56 | ||
57 | <para>If no parameter is passed, <command>systemd-cat</command> | |
58 | will write everything it reads from standard input (stdin) to the | |
59 | journal.</para> | |
60 | ||
61 | <para>If parameters are passed, they are executed as command line | |
62 | with standard output (stdout) and standard error output (stderr) | |
63 | connected to the journal, so that all it writes is stored in the | |
64 | journal.</para> | |
65 | </refsect1> | |
66 | ||
67 | <refsect1> | |
68 | <title>Options</title> | |
69 | ||
70 | <para>The following options are understood:</para> | |
71 | ||
72 | <variablelist> | |
73 | <xi:include href="standard-options.xml" xpointer="help" /> | |
74 | <xi:include href="standard-options.xml" xpointer="version" /> | |
75 | ||
76 | <varlistentry> | |
77 | <term><option>-t</option></term> | |
78 | <term><option>--identifier=</option></term> | |
79 | ||
80 | <listitem><para>Specify a short string that is used to | |
81 | identify the logging tool. If not specified, no identification | |
82 | string is written to the journal.</para></listitem> | |
83 | </varlistentry> | |
84 | ||
85 | <varlistentry> | |
86 | <term><option>-p</option></term> | |
87 | <term><option>--priority=</option></term> | |
88 | ||
89 | <listitem><para>Specify the default priority level for the | |
90 | logged messages. Pass one of | |
91 | <literal>emerg</literal>, | |
92 | <literal>alert</literal>, | |
93 | <literal>crit</literal>, | |
94 | <literal>err</literal>, | |
95 | <literal>warning</literal>, | |
96 | <literal>notice</literal>, | |
97 | <literal>info</literal>, | |
98 | <literal>debug</literal>, or a | |
99 | value between 0 and 7 (corresponding to the same named | |
100 | levels). These priority values are the same as defined by | |
101 | <citerefentry project='man-pages'><refentrytitle>syslog</refentrytitle><manvolnum>3</manvolnum></citerefentry>. | |
102 | Defaults to <literal>info</literal>. Note that this simply | |
103 | controls the default, individual lines may be logged with | |
b938cb90 | 104 | different levels if they are prefixed accordingly. For details, |
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105 | see <option>--level-prefix=</option> below.</para></listitem> |
106 | </varlistentry> | |
107 | ||
108 | <varlistentry> | |
109 | <term><option>--level-prefix=</option></term> | |
110 | ||
111 | <listitem><para>Controls whether lines read are parsed for | |
112 | syslog priority level prefixes. If enabled (the default), a | |
113 | line prefixed with a priority prefix such as | |
114 | <literal><5></literal> is logged at priority 5 | |
115 | (<literal>notice</literal>), and similar for the other | |
116 | priority levels. Takes a boolean argument.</para></listitem> | |
117 | </varlistentry> | |
118 | ||
119 | </variablelist> | |
120 | ||
121 | </refsect1> | |
122 | ||
123 | <refsect1> | |
124 | <title>Exit status</title> | |
125 | ||
126 | <para>On success, 0 is returned, a non-zero failure code | |
127 | otherwise.</para> | |
128 | </refsect1> | |
129 | ||
130 | <refsect1> | |
131 | <title>Examples</title> | |
132 | ||
133 | <example> | |
134 | <title>Invoke a program</title> | |
135 | ||
136 | <para>This calls <filename noindex='true'>/bin/ls</filename> | |
137 | with standard output and error connected to the journal:</para> | |
138 | ||
139 | <programlisting># systemd-cat ls</programlisting> | |
140 | </example> | |
141 | ||
142 | <example> | |
143 | <title>Usage in a shell pipeline</title> | |
144 | ||
145 | <para>This builds a shell pipeline also invoking | |
146 | <filename>/bin/ls</filename> and writes the output it generates | |
147 | to the journal:</para> | |
148 | ||
149 | <programlisting># ls | systemd-cat</programlisting> | |
150 | </example> | |
151 | ||
152 | <para>Even though the two examples have very similar effects the | |
153 | first is preferable since only one process is running at a time, | |
154 | and both stdout and stderr are captured while in the second | |
155 | example, only stdout is captured.</para> | |
156 | </refsect1> | |
157 | ||
158 | <refsect1> | |
159 | <title>See Also</title> | |
160 | <para> | |
161 | <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>, | |
162 | <citerefentry><refentrytitle>systemctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>, | |
3ba3a79d | 163 | <citerefentry project='man-pages'><refentrytitle>logger</refentrytitle><manvolnum>1</manvolnum></citerefentry> |
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164 | </para> |
165 | </refsect1> | |
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166 | |
167 | </refentry> |